The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
breaker meltdown
by sparky
Yesterday at 07:30 PM
230 or 345 kV transmission lines?
by Vlado
09/24/16 09:33 AM
Electrical mast flashing product
by ThomasWinfrey
09/22/16 12:14 AM
What estimating software do you recommend?
by sparky
09/21/16 07:20 PM
"Dry Run" Inspection goes awry
by HotLine1
09/20/16 07:39 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
HotLine1 13
sparky 10
sparky66wv 8
gfretwell 8
Vlado 6
Who's Online
2 registered (mbhydro, cableguy619), 259 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#207009 - 09/13/12 03:09 PM ESR Meter
KJay Offline
Member

Registered: 11/27/07
Posts: 763
Loc: MA, USA
When you need to check capacitors on a pcb do you use an ESR meter that can test with them in the circuit or do you lift one leg or even remove them completely to do your tests. I have been contemplating maybe getting an ESR meter, but not really sure how consistently accurate they are when doing tests with the caps still in place on the board.

TKX

Top
Study Guides for VDV / Structured Cabling Installers
#207011 - 09/13/12 11:52 PM Re: ESR Meter [Re: KJay]
JoeTestingEngr Offline
Member

Registered: 11/04/05
Posts: 786
Loc: Chicago, Il.
I have seen and changed dozens of open electrolytics and probably a few shorted ones. I don't think I've ever even conceived of trying to measure the ESR or ESL of one. Wouldn't that be a physical property, unlikely to change unless the cap has sustained visible damage. The puffed up caps on Dell motherboards probably have the same ESR as the normal ones. I do check for leakage though.
Joe

Top
#207028 - 09/16/12 01:57 PM Re: ESR Meter [Re: JoeTestingEngr]
KJay Offline
Member

Registered: 11/27/07
Posts: 763
Loc: MA, USA
I'm not exactly sure yet how these differ from a standard stand-alone cap tester or multimeter with cap test function. Seems the better models of these things are generally a little too pricy for me right now, but I found a cheap ESR made by Blue that I may look into getting later on.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals